at.chrl.nutils.ncrypt

Class BlowfishCipher

java.lang.Object

at.chrl.nutils.ncrypt.BlowfishCipher

public class BlowfishCipher
extends Object

Blowfish Cipher - symmetric 16-round cipher, uses 64-bit blocks, 32-448 key size and key-dependend 32-bit four S-boxes

Author:

EvilSpirit

Constructor Summary

Constructors

Constructor and Description
BlowfishCipher(byte[] blowfishKey) Default constructor.

Method Summary

Modifier and Type	Method and Description
void	cipher(byte[] data) Cipher the given byte-array with Blowfish cipher
void	cipher(byte[] data, int offset, int length) Cipher the given byte-array with Blowfish cipher
void	decipher(byte[] data) Decipher the given byte-array with Blowfish cipher
void	decipher(byte[] data, int offset, int length) Decipher the given byte-array with Blowfish cipher
void	updateKey(byte[] blowfishKey) Update current blowfish key with the new one and reinitialize the P-array and S-boxes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BlowfishCipher

public BlowfishCipher(byte[] blowfishKey)

Default constructor. Initializes the Blowfish Cipher with blowfishKey

Parameters:

blowfishKey - Blowfish Key

Method Detail

updateKey

public void updateKey(byte[] blowfishKey)

Update current blowfish key with the new one and reinitialize the P-array and S-boxes

Parameters:

blowfishKey - new blowfish key

cipher

public void cipher(byte[] data)

Cipher the given byte-array with Blowfish cipher

Parameters:

data - byte array to be ciphered

cipher

public void cipher(byte[] data,
                   int offset,
                   int length)

Cipher the given byte-array with Blowfish cipher

Parameters:

data - byte array to be ciphered

offset - byte array offset

length - byte array length

decipher

public void decipher(byte[] data)

Decipher the given byte-array with Blowfish cipher

Parameters:

data - byte array to be deciphered

decipher

public void decipher(byte[] data,
                     int offset,
                     int length)

Decipher the given byte-array with Blowfish cipher

Parameters:

data - byte array to be deciphered

offset - byte array offset

length - byte array length